connection in the southern part of the tunnel were built. Similarly, the connection of the Dresden Railway to Berlin has still not been rebuilt. The Südkreuz station was originally opened with only two of its three long-distance platforms. The third platform was not connected to the network until late 2007 to provide additional capacity during traffic disruptions. Rail services The route is open only for passenger trains; freight is not allowed. The terms of access require the use of a retention toilet system and the use of eddy current brakes is not permitted on the line. Diesel trains can only run on the line in an emergency (such as towing a wrecked train). The train service has not changed substantially since the opening of the line in 2006, apart from the fact that the Hamburg–Leipzig–Munich Intercity-Express (ICE) line has since 2008 usually divided in Berlin, so that instead of a continuous service there has been a Hamburg–Südkreuz train and a Gesundbrunnen–Munich train on the line. The following table shows the services of long-distance and regional lines, which run on the north-south main line (as of 2015): services run from Spandau on the Lehrter line to the meeting of the two lines at the northern end of the Hauptbahnhof and from Gesundbrunnen on the Wedding branch to the north-south mainline. All trains go via Berlin Hauptbahnhof; almost all continue to Südkreuz. In addition, there are a number of less regular services. The night train runs between Paris and Berlin-Südkreuz. A number of additional Intercity (IC) trains run at the weekend towards Hanover and Cologne as well as to Frankfurt am Main use the route. Most of the ICE and IC trains run on these routes, on the other hand, use the Stadtbahn. Deutsche Bahn has made relatively little use of the capacity of the four-track line. Initially it was planned to run ICE trains from Frankfurt to Südkreuz. Those plans came to nothing, however, because there were no equivalent for the maintenance of trains to the Rummelsburg yard that was available for trains on the Stadtbahn that would not require additional expenditure. Given the lack of an S-Bahn connection to Berlin Hauptbahnhof in the north-south direction, there was a proposal to use the spare capacity of the north-south mainline for the S-Bahn. However, it has now been agreed to build a new S-Bahn line from the northern Ring Bahn to Hauptbahnhof,